File holder



Nov. 13, 1928.

W. M. HOWSER FILE HOLDER Filed Aug. 16, 1927 I/M Waar Patented Nov.. `13, 1928.,

UNuEeSm-ES incisos Partnr ortica.

WALTER' ir. nov/sneer .LA Ponen, rumana 1 'Finis nonnen. I

Application sied Aagst is. raar. sei-iai no. alam..

This invention relates to file holders 'and morepai'ticularly to a device of this charac` ter 'for-use in simultaneously holdinga plurality of lilesfoi rotativeaction upon a' surface; 1 1

' An important object ot the invention is to provide a device ot this character in which the angle ofthe' supported files may be VVreadily altered to suit the surface which is tobe acted upon, whereby the'tool may be conveniently employed in breaking the glaze on the valve seats of internal combustion engines.

.if-i further cbj ect of the invention is to provide a device ot this character which may be i readily and cheaply' constructed, which is sinipie in its Voperation and which may be readily adapted or litted for use in the treat-V ment of valve seats, the guide bores of which ternal combustion engine, one of the lesbey ing shown as applied and the remaining files removed from the device;

Figure 2 is a plan view of the filehol'der ;r

Figure 3 is a vertical sectional view therethrough;

Figure 4 is a plan view of an alternative form of file whichmay be employed when treating valve seats;

Figure 5 is a sectional view therethrough;

Figures 6 and 7 are views of ybushingsv which may be employed 'for guiding the stem in enlarged bores. y l

Referring now more particularly to the drawing, the numeral 10 generally designates a stem having at its upper end a reduction 11, the terminal portion of which is eXteri nally screw-threaded for the reception of a nut'12. The characterv 13 generally designates a spider having an opening for the passage o'f the reduced extension 11, so that the spider may seat upon the shoulder 14 formed by the reduction vof the stem 10 andv be clamped thereagainst by the nut 12.

The spider 13 comprises a hub portion from which radiate uniformly spaced arms 15, the outer ends and under faces of which are providedwith file receiving channels 16 producing spaced ianges 17 Y The innerends c of the arn'isare pierced by verticallyextend-4 ing bores 18andfrom the base of the ehannels 16 to the bores 18,'the arms arespliiaasA at 19. Inwardly 'of the channels, each'armis provided with arbore 20v'forthe reception of i' a binding'screw 21, the bore 20 at one side' of the split A19 permitting rotation foftlie bolt and at the 'opposite side of the splitA being 'threadedl i'for 'coaction therewith, so that this nut may be employed to constrict the opening at the splitand thus cause the flanges 17.

go approach-one another -andfcl amp upon the It will. be obvious that inbreaking the glaze of or removing carbon from the valve` seats orthe adjacent portions of the gas conducting channels of internal combustion engines, the stem 10 may be ext-ended into the guide, tiles F placed in the channels 16 of the arms, fitted against the surface which is to be operated'upoii and secured by adjusting y' the clamping screws 21. The nut 12 is preferably o'lisuch size that it may be conveniently engaged by the type of wrench ordinarily known in the automobile industry as a speed wrench, thereby enabling` the device to be rapidly and conveniently'rotated.

For use in dressing valve seats, tile structures generally shown at F may be employed.

This comprises a disk adapted to replace the spider 13 upon the stem 10 having a conical vperiphery 22 formed as a file for coaction with the valve seat. To enable; the stem 1() to bel fitted in bores of different diameters, bushings such as illustrated in Figures 6 and 7 at 23 may be employed. Where 7the bores are closely relatedias to diameter, stems o'f'dif-V Y ferent sizes may be employed.

lt will be obvious that a device of this char-V Y acter may be very readily and cheaply 'prof l' A duced and may be readily prepared for use upon any given surface by anyone Who" is in any way familiar with the handling of. tools. It will also be obviousthat the construction hereinbefore set forth is capable of a certain range `of change an-d modification without materially departingfrom the spirit of the invention and Iv accordingly do not limit niyself'to such specilic.y structure except as hereinafter claimed.

l claim 1. In a ileholder for holding tiles for ro. tative treatment ot surfaces, a stem having y at one end a plurality of radiating arms, the outer end oteach arm, having a lile receiving groove, said arms being split and means for contracting the split ends of the arms to clamp the files engaged therewith.

y 2. In a file holder for holding files for r0^ tative treatment of surfaces, a stem having at oneUendapl-urality of radiatin(r arms, the outer end of each arm havin" `a fi e receiving.

groove, said arms being;k split to permit their contraction uponv a. file Supported in the grooveand means fOr CQnt-racting the arm, SeidlA grooves-,extending across the Outer ends c and under faces of the arms to thereby permit the file to be disposed in a desired angular relation yto the axis of the stem. L y l 3; In adevice for :holding vfiles Yfor use .in

' treatingcylindric or come faces wherein the face tube treated has associated therewith a Y bore which Vis axial thereto,y astem adapted to engage in` the bore,V a spider secured to the treating cylindric or conic facesvvvherein the` face to be treated has associated therewith a bore which is axial thereto, a' stem adapted to engage in the bore, a spider secured to the stem at one end thereof and embodying ra,- diating arms, the outer end of each armyhavlng a le receiving groove, saidl arms being split and means for contracting the lsplit'ends of thearms to thereby contract Said ends and clamp les disposed Within the grooves.

In testimony vwhereof I hereunto ax my signature.' l v n y WALTER MHOWSER. 

